My glasses came with "easyclip" (brand name?) clip-on sunglasses that are polarized. I bought them at Costco for around $150 (frames & clip-on only, lenses extra). I usually wear contacts and regular sunglasses when fishing but the few times I've kept my glasses on, the clip-on still worked pretty well. I'm sure you can find them in most eyeglass stores - the clip-on is made to fit that specific frame and uses small magnets to attach. At Costco, there were like 20 different styles to choose from.